Chandra Sekaran
Ansys Employee

Use PRRS to check if the reaction forces match the applied loads.

FSUM works based on currently selected elements and nodes. 'asel' by itself does not select the nodes and elements. Also remember that the model is in equilibrium if the solution converges successfully. So sum of forces at a node (if all the elements attached to the node are selected) should be zero. So you may want to select the nodes at the interface and the elements of the soft material that are conneced to these nodes and do FSUM.